Hinge Mechanism and Electronic Device

This application is continuation of International Application No. PCT/CN2024/127625 filed on October 28, 2024, which claims priority to Chinese Patent Application No. 202311467166.X filed on November 3, 2023, which are incorporated herein by reference in their entireties.

This application belongs to the field of communication technologies, and specifically relates to a hinge mechanism and an electronic device.

With the development of science and technology, people’s dependence on electronic devices is increasing. To improve portability and comfort of use of electronic devices, an application range of the foldable electronic devices is becoming wider.

In the related art, a foldable electronic device is folded and unfolded via a hinge mechanism. The hinge mechanism includes a base and a swing arm, and the swing arm is rotatably connected to the base. In a process of switching the hinge mechanism from an unfolded state to a folded state, the swing arm rotates by a certain angle relative to the base. A mating area between the swing arm and the base is small; stability of the swing arm is reduced, and the swing arm is prone to problems such as jamming, breakage, and deformation. As a result, folding reliability of the hinge mechanism is reduced.

An objective of embodiments of this application is to provide a hinge mechanism and an electronic device.

According to a first aspect, an embodiment of this application provides a hinge mechanism, including a base, a first swing arm, and a frame connecting member.

The first swing arm includes a first swing arm body, a first rotating connection portion, and a second rotating connection portion, the first rotating connection portion and the second rotating connection portion are disposed at two ends of the first swing arm body, the first rotating connection portion is rotatably connected to the base, and the second rotating connection portion is rotatably connected to the frame connecting member.

A first slide groove is provided in the frame connecting member, and the first slide groove is provided with a component along a first direction, where the first direction is a direction perpendicular to a plane on which the first swing arm body is located. The second rotating connection portion is a cylindrical structure, and the second rotating connection portion is located in the first slide groove and is in movable fit with the first slide groove. In a process in which the first swing arm rotates relative to the base, the second rotating connection portion slides and rotates in the first slide groove.

According to a second aspect, an embodiment of this application further provides an electronic device, including a first device body, a second device body, and the hinge mechanism as described above. The first device body is connected to the second device body via the hinge mechanism.

In a process in which the first device body and the second device body rotate relative to each other, the electronic device switches between an unfolded state and a folded state.

Technical solutions in embodiments of this application are clearly described below with reference to the accompanying drawings in embodiments of this application. It is clear that the described embodiments are some embodiments of this application, but not all embodiments. Based on embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Terms ''first'', ''second'', and the like in the specification and claims of this application are used to distinguish between similar objects, but are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that embodiments of this application can be implemented in a sequence other than those illustrated or described herein. Objects distinguished by ''first'', ''second'', and the like are usually of one type, and a quantity of objects is not limited. For example, there may be one or more first objects. In addition, ''and/or'' in the specification and claims indicates at least one of connected objects, and character ''/'' generally indicates that preceding and following related objects are in an ''or'' relationship.

A hinge mechanism and an electronic device provided in embodiments of this application are described in detail below using specific embodiments and application scenarios thereof with reference to the accompanying drawings.

1 FIG. 16 FIG. 100 200 300 100 200 300 200 100 300 200 300 200 100 Refer toto. A hinge mechanism disclosed in embodiments of this application is applied to an electronic device, and the electronic device is folded and unfolded via the hinge mechanism. The hinge mechanism includes a base, a first swing arm, and a frame connecting member. The baseis a foundation for mounting the first swing armand the frame connecting member. The first swing armis rotatably connected to the base. The frame connecting memberis rotatably connected to the first swing arm, and the frame connecting membercan drive the first swing armto rotate relative to the base.

12 FIG. 200 210 220 230 210 220 230 210 220 230 220 230 210 220 100 230 300 120 100 120 220 120 100 220 As shown in, the first swing armincludes a first swing arm body, a first rotating connection portion, and a second rotating connection portion. Optionally, the first swing arm body, the first rotating connection portion, and the second rotating connection portionmay be an integral structure. The first swing arm bodyis a foundation for disposing the first rotating connection portionand the second rotating connection portion, the first rotating connection portionand the second rotating connection portionare disposed at two ends of the first swing arm body, the first rotating connection portionis rotatably connected to the base, and the second rotating connection portionis rotatably connected to the frame connecting member. Optionally, the hinge mechanism further includes a rotation shaft, the baseis connected to the rotation shaft, the first rotating connection portionmay be a cylindrical portion, and the outside of the rotation shaftmay be sleeved in the cylindrical portion, to achieve rotatable connection between the baseand the first rotating connection portion.

310 300 310 210 230 230 310 310 310 200 100 230 310 300 200 100 310 200 300 4 FIG. A first slide grooveis provided in the frame connecting member, and the first slide grooveis provided with a component along a first direction. The first direction is a direction perpendicular to a plane on which the first swing arm bodyis located, and the first direction may refer to the "X" direction in. The second rotating connection portionis a cylindrical structure, the second rotating connection portionis located in the first slide grooveand is in movable fit with the first slide groove, and a surface of the cylindrical structure is in contact with a slot wall surface of the first slide groove. In a process in which the first swing armrotates relative to the base, the second rotating connection portionslides and rotates in the first slide groove. That is, in a process in which the frame connecting memberdrives the first swing armto rotate relative to the base, via the cylindrical structure and the first slide groove, the first swing armcan generate a sliding displacement relative to the frame connecting memberin the first direction.

310 310 310 300 200 100 Optionally, the first slide groovemay be an arc-shaped structure, or may extend directly along the first direction, or may be a slide groove in another shape. This embodiment does not limit the structure of the first slide grooveprovided that the first slide grooveis provided with a component along the first direction, ensuring that both the frame connecting memberand the first swing armcan rotate smoothly relative to the base.

300 100 300 200 100 300 310 200 300 300 200 300 310 300 200 100 200 300 200 100 300 100 200 200 100 200 100 200 In embodiments of this application, with external force acting on the frame connecting member, while rotating relative to the base, the frame connecting memberdrives the first swing armto rotate relative to the base. However, because the first swing arm 200 is rotatably connected to the frame connecting membervia the cylindrical structure and the first slide groove, the first swing armnot only can rotate relative to the frame connecting member, but also slide relative to the frame connecting member. The fitting structure is simple, without disposing a separate adapter component between the first swing armand the frame connecting member, and the first slide grooveis provided with a component along the first direction. In this case, in a process in which both the frame connecting memberand the first swing armrotate relative to the base, the first swing armcan generate a sliding displacement relative to the frame connecting memberin the first direction. In this way, a rotation angle of the first swing armrelative to the baseis caused to be smaller than a rotation angle of the frame connecting memberrelative to the base, to reduce the rotation angle of the first swing arm. This helps increase a mating area between the first swing armand the base. In addition, a rotation angle of the first swing armrelative to the baseis reduced under the condition of ensuring a rotation angle of a frame, to improve rotation stability of the first swing arm. This helps improve folding reliability of the hinge mechanism.

10 FIG. 200 300 200 300 200 300 200 300 300 Moreover, it can be learned fromthat due to the sliding displacement generated by the first swing armrelative to the frame connecting memberin the first direction, in a folding process of the hinge mechanism, the first swing armcan adjust its own position following a position of the frame connecting member. When the hinge mechanism is in a folded state, in a thickness direction of the hinge mechanism, space occupied by the first swing armbasically overlaps with space occupied by the frame connecting member, that is, the first swing armdoes not protrude from the frame connecting memberat this time. Reducing space occupied by the first swing arm 200 and the frame connecting memberhelps reduce thickness of the hinge mechanism in the folded state and make the hinge mechanism more lightweight and thinner.

310 310 310 230 200 100 300 200 300 100 300 100 300 200 100 4 FIG. 4 FIG. In an optional embodiment, the first slide groovemay be provided with only a component along the first direction, that is, the first slide grooveextends directly along the first direction. In another embodiment, as shown in, the first slide grooveis further provided with a component along a second direction, the second direction is perpendicular to the first direction, and the second direction is perpendicular to a direction of an axis of the second rotating connection portion. The second direction may refer to the "Y" direction in. In this embodiment, in an unfolding process of the hinge mechanism, a position of the first swing armrelative to the basein the second direction remains unchanged while the frame connecting membergenerates a sliding displacement relative to the first swing armin the second direction; as a result, the frame connecting membergenerates a certain displacement relative to the basealong the second direction, and the frame connecting memberapproaches the baseby a certain distance. In this way, in a width direction of the hinge mechanism, space occupied by the frame connecting member, the first swing arm, and the baseis reduced. This helps reduce a width of the hinge mechanism.

12 FIG. 12 FIG. 230 210 230 230 410 300 230 310 410 300 230 310 In an optional embodiment, as shown in, the second rotating connection portionprotrudes from a surface of the first swing arm bodyin a third direction. The third direction is perpendicular to the first direction, and the third direction is parallel to a direction of an axis of the second rotating connection portion. The third direction may refer to the "Z" direction shown in. Optionally, the third direction is perpendicular to the first direction and the second direction mentioned above. In this embodiment, with the protruding direction of the second rotating connection portionbeing different from a direction in which a second swing armand the frame connecting membergenerate relative sliding in this embodiment, the second rotating connection portionis not detached from the first slide groovein a process in which the second swing armand the frame connecting memberslide relative to each other, ensuring continuous fitting between the second rotating connection portionand the first slide groove.

310 230 210 230 210 Definitely, in the embodiment in which the first slide grooveis provided with only a component along the first direction, the second rotating connection portionmay alternatively protrude from the surface of the first swing arm bodyin another direction. Optionally, the second rotating connection portionmay alternatively protrude from the surface of the first swing arm bodyin the second direction.

310 230 310 230 310 230 In an optional embodiment, a difference between a slot width of the first slide grooveand a diameter of the second rotating connection portionis within a preset range. Optionally, the preset range is a range between 0 and a preset value, and the preset value may be 0.05 mm or another value, and the preset value may be set as needed. To be specific, the slot width of the first slide groovemay be equal to the diameter of the second rotating connection portion, or the difference between the slot width of the first slide grooveand the diameter of the second rotating connection portionmay be less than the preset value.

230 310 230 310 230 310 A small gap between the second rotating connection portionand the first slide groovein this embodiment ensures stability of the second rotating connection portionsliding and rotating in the first slide groove, and avoids the second rotating connection portionfrom shaking in the first slide groove.

13 FIG. 12 FIG. 320 300 200 250 320 250 310 300 200 100 320 250 320 250 In an optional embodiment, as shown in, a limiting protrusionis provided on the frame connecting member. As shown in, the first swing armis provided with a limiting slot, and the limiting protrusionis in limiting fit with the limiting slotin the extension direction of the first slide groove. Optionally, in the process in which the frame connecting memberand the first swing armrotate relative to the base, the limiting protrusioncan extend into the limiting slot, and the limiting protrusioncan contact the limiting slotin a limiting manner.

200 300 320 250 230 310 300 200 With a position at which the first swing armand the frame connecting memberslide relative to each other via the limiting protrusionand the limiting slotbeing limited in this embodiment, a sliding displacement is small. This further prevents the second rotating connection portionfrom sliding out of the first slide groove, ensuring stable connection between the frame connecting memberand the first swing arm.

320 250 200 300 200 Definitely, in another embodiment, no limiting protrusionor limiting slotmay be provided in the frame connecting member 300 and the first swing arm, and the hinge mechanism may use another component to limit the position at which the frame connecting memberand the first swing armslide relative to each other.

230 310 In an optional embodiment, there is one second rotating connection portionand one first slide groove.

12 FIG. 13 FIG. 230 310 230 310 230 310 230 In another embodiment, as shown inand, there are at least two second rotating connection portionsand at least two first slide grooves, and the second rotating connection portionscorrespond one-to-one to the first slide grooves. Two of the second rotating connection portions 230 are disposed back away from each other in the direction of the axis of the second rotating connection portion, and two of the first slide groovescorresponding to two of the second rotating connection portionsare disposed facing each other.

230 310 300 200 300 200 310 200 300 230 230 310 With a plurality of second rotating connection portionsand a plurality of first slide groovesdisposed in this embodiment, different positions of the frame connecting memberare caused to rotatably connect to different positions of the first swing arm, respectively. This helps improve stability of connection between the frame connecting memberand the first swing armand enhance reliability of the hinge mechanism. In addition, two first slide groovesdisposed facing each other make the first swing armbe in limiting fit with the frame connecting memberin two opposite directions of the axis of the second rotating connection portion, so that the second rotating connection portionis not detached from the corresponding first slide groove.

5 FIG. 320 310 250 230 250 310 230 230 310 In a further embodiment, as shown in, a limiting protrusionis located between two of the first slide groovesthat are disposed facing each other, and a limiting slotis located between two of the second rotating connection portionsthat are disposed back away from each other. The limiting protrusion 320 and the limiting slotin this embodiment can simultaneously limit the two groups of first slide groovesand second rotating connection portionsthat fit with each other in pair, so that the two second rotating connection portionsare not detached from the corresponding first slide grooves.

320 250 Definitely, in other embodiments, the limiting protrusionand the limiting slotmay alternatively be disposed in other positions.

410 410 411 412 413 411 412 413 412 413 411 412 100 120 120 100 120 412 410 120 411 300 413 210 410 200 300 410 100 411 412 413 14 FIG. In an optional embodiment, the hinge mechanism further includes a second swing arm. As shown in, the second swing armincludes a second swing arm body, a third rotating connection portion, and a fourth rotating connection portion. The second swing arm bodyis a foundation for disposing the third rotating connection portionand the fourth rotating connection portion. The third rotating connection portionand the fourth rotating connection portionare disposed at two ends of the second swing arm body. The third rotating connection portionis rotatably connected to the base. Optionally, the hinge mechanism further includes a rotation shaft, the rotation shaftis connected to the base, the outside of the rotation shaftis sleeved in the third rotating connection portion, and the second swing armcan rotate relative to the rotation shaft. In addition, the second swing arm bodyis slidably connected to the frame connecting member, the fourth rotating connection portionis movably connected to the first swing arm body, and the second swing armslides and rotates relative to the first swing armunder the condition of the frame connecting memberdriving the second swing armto rotate relative to the base. Optionally, the second swing arm body, the third rotating connection portion, and the fourth rotating connection portionmay be an integral structure.

240 210 240 230 413 413 240 240 240 410 100 413 240 300 410 100 240 410 200 A second slide grooveis provided in the first swing arm body, and the second slide grooveis provided with components along the first direction and a second direction. The second direction is perpendicular to the first direction, and the second direction is perpendicular to the direction of the axis of the second rotating connection portion. The fourth rotating connection portionis a cylindrical structure, the fourth rotating connection portionis located in the second slide grooveand is in movable fit with the second slide groove, and a surface of the cylindrical structure is in contact with a slot wall surface of the second slide groove. Under the case of the second swing armrotating relative to the base, the fourth rotating connection portionslides and rotates in the second slide groove. That is, in a process in which the frame connecting memberdrives the second swing armto rotate relative to the base, with the cylindrical structure and the second slide groove, the second swing armcan generate sliding displacements relative to the first swing armin the first direction and the second direction.

240 240 240 410 200 Optionally, the second slide groovemay be an arc-shaped structure, a linear structure, or a slide groove in another shape. This embodiment does not limit the structure of the second slide groove, provided that the second slide grooveis provided with components along the first direction and the second direction and ensures smooth movement of the second swing armrelative to the first swing arm.

410 200 300 410 200 200 410 200 410 200 300 240 413 200 410 On the basis of the second swing armand the first swing armbeing rotatably connected to the frame connecting memberin this embodiment, the second swing armis further movably connected to the first swing arm, to improve connection stability and effectively avoid problems such as shaking of the first swing armin a movement process. In addition, with the second swing armand the first swing armsliding and rotating relative to each other, a normal movement process of the second swing armand the first swing armrelative to the frame connecting membercannot be affected. Moreover, with the simple fitting structure of the second slide grooveand the fourth rotating connection portion, no separate adapter piece needs to be disposed between the first swing armand the second swing arm. This helps simplify the structure of the hinge mechanism.

7 FIG. 330 300 411 414 300 411 414 330 414 330 330 300 414 411 414 300 330 411 330 414 300 411 In an optional embodiment, as shown in, a third slide grooveis provided in one of the frame connecting memberand the second swing arm body, and a first slide railis provided on the other of the frame connecting memberand the second swing arm body. The first slide railextends into the third slide groove, and the first slide railis in sliding fit with the third slide groove. Optionally, the third slide groovemay be provided in the frame connecting member, and first slide railis provided on the second swing arm body; or the first slide railis provided on the frame connecting member, and the third slide grooveis provided in the second swing arm body. In this way, with the third slide grooveand first slide railfitting with each other, the frame connecting memberand the second swing arm bodydirectly slide relative to each other, without disposing a complex sliding connection structure.

14 FIG. 413 414 Optionally, as shown in, the fourth rotating connection portionis disposed back away from the first slide rail.

300 411 Definitely, in another embodiment, the frame connecting membermay alternatively be slidably connected to the second swing arm bodyby using another method.

1 FIG. 510 600 412 510 510 600 412 510 510 600 600 600 120 600 412 In the solution of this application, as shown in, the hinge mechanism further includes a first movable memberand an elastic member. A first driving curved surface a is provided on the third rotating connection portion, and a second driving curved surface b is provided on the first movable member. The first driving curved surface a and the second driving curved surface b fit with each other. The first movable memberis connected to the elastic member. When the third rotating connection portionrotates, the first movable memberis driven to move through the first driving curved surface a and the second driving curved surface b. The first movable memberacts on the elastic memberto cause the elastic memberto undergo elastic deformation. The elastic membermay be, but is not limited to, a spring. Optionally, the outside of the rotation shaftmay be sleeved in the elastic member. Optionally, each of the first driving curved surface a and the second driving curved surface b includes a plurality of first concave surfaces and a plurality of first convex surfaces. The first concave surfaces and the first convex surfaces are alternately distributed in a circumferential direction of the third rotating connection portion.

410 510 600 600 410 410 With the second swing armdriving the first movable memberduring rotation to move in this embodiment, the elastic membergenerates an elastic deformation amount. Elastic force generated by the elastic memberacts reversely on the second swing arm, increasing damping force borne by the second swing armin the rotation process, improving damping effect of the hinge mechanism, and facilitating the hinge mechanism to maintain at a certain folding angle.

420 520 420 100 420 300 120 420 420 120 340 420 300 420 300 340 340 In an optional embodiment, the hinge mechanism further includes a third swing armand a second movable member. The third swing armis rotatably connected to the base, and the third swing armis slidably connected to the frame connecting member. Optionally, the outside of the rotation shaftis sleeved in the third swing arm, and the third swing armcan rotate around the rotation shaft. A fourth slide grooveis provided in one of the third swing armand the frame connecting member, and a second slide rail is provided on the other of the third swing armand the frame connecting member. The second slide rail extends into the fourth slide groove, and the second slide rail is in sliding fit with the fourth slide groove.

420 520 420 520 420 520 600 411 520 600 420 510 520 510 520 600 A third driving curved surface c is provided on the third swing arm, and a fourth driving curved surface d is provided on the second movable member. The third driving curved surface c and the fourth driving curved surface d fit with each other. During rotation, the third swing armdrives the second movable memberthrough the third driving curved surface c and the fourth driving curved surface d to move. Both the third swing armand the second movable memberare located on a side that is of the elastic memberand that faces away from the second swing arm body, and the second movable memberis located between the elastic memberand the third swing arm. In this way, a moving direction of the first movable memberis opposite a moving direction of the second movable member, and the first movable memberand the second movable memberact on two ends of the same elastic member, respectively.

420 100 Optionally, each of the third driving curved surface c and the fourth driving curved surface d includes a plurality of second concave surfaces and a plurality of second convex surfaces. The second concave surfaces and the second convex surfaces are alternately distributed in a circumferential direction of a rotation axis of the third swing armrelative to the base.

520 420 510 520 600 600 510 520 600 With the second movable memberand the third swing armadded in this embodiment, both the first movable memberand the second movable membercan act on the same elastic member. This helps increase an elastic deformation amount of the elastic memberand further improve damping effect of the hinge mechanism. In addition, the first movable memberand the second movable memberdo not need to act on different elastic members. This helps reduce a quantity of components in the hinge mechanism and simplify the structure of the hinge mechanism.

430 530 430 100 120 430 430 120 430 300 350 430 300 430 300 350 350 430 530 420 410 530 420 430 In an optional embodiment, the hinge mechanism further includes a fourth swing armand a third movable member. The fourth swing armis rotatably connected to the base. Optionally, the outside of the rotation shaftis sleeved in the fourth swing arm, and the fourth swing armcan rotate around the rotation shaft. In addition, the fourth swing armis slidably connected to the frame connecting member. Optionally, a fifth slide grooveis provided in one of the fourth swing armand the frame connecting member, and a third slide rail is provided on the other of the fourth swing armand the frame connecting member. The third slide rail extends into the fifth slide groove, and the third slide rail is in sliding fit with the fifth slide groove. Both the fourth swing armand the third movable memberare located on a side that is of the third swing armand that faces away from the second swing arm, and the third movable memberis located between the third swing armand the fourth swing arm.

430 530 430 530 530 430 530 430 530 510 A fifth driving curved surface e is further provided on the fourth swing arm, and a sixth driving curved surface f is provided on the third movable member. The fifth driving curved surface e and the sixth driving curved surface f fit with each other. During rotation, the fourth swing armdrives the third movable memberthrough the fifth driving curved surface e and the sixth driving curved surface f to move. In addition, a seventh driving curved surface is provided on the third movable member, and an eighth driving curved surface is further provided on the fourth swing arm. The seventh driving curved surface and the eighth driving curved surface fit with each other. During movement, the third movable memberdrives the fourth swing armthrough the seventh driving curved surface and the eighth driving curved surface to rotate. A moving direction of the third movable memberis the same as a moving direction of the first movable member.

430 100 Optionally, each of the fifth driving curved surface e, the sixth driving curved surface f, the seventh driving curved surface, and the eighth driving curved surface includes a plurality of third concave surfaces and a plurality of third convex surfaces. The third concave surfaces and the third convex surfaces are alternately distributed in a circumferential direction of a rotation axis of the fourth swing armrelative to the base.

420 530 430 420 530 530 430 430 530 530 420 300 100 With the third swing arm, the third movable member, and the fourth swing armfitting in sequence in this embodiment, when the third swing armacts on the third movable member, the third movable membermoves and drives the fourth swing armto rotate. Similarly, when the fourth swing armacts on the third movable member, the third movable membermoves and drives the third swing armto rotate. This helps achieve the overall rotation of the frame connecting memberrelative to the baseand facilitate smooth folding and unfolding of the hinge mechanism.

220 110 100 110 110 200 300 110 110 10 FIG. In an optional embodiment, the first rotating connection portionis an arc-shaped protrusion, and an arc-shaped slotis provided in the base. The arc-shaped protrusion extends into the arc-shaped slot, and the arc-shaped protrusion is in sliding fit with the arc-shaped slot, so that the first swing armrotates relative to the frame connecting member. Optionally, as shown in, under the condition of the hinge mechanism being in an unfolded state, the entire arc-shaped protrusion is located within the arc-shaped slot. In a process in which the hinge mechanism switches from the unfolded state to a folded state, a part, extending out of the arc-shaped slot, of the arc-shaped protrusion increases.

110 200 100 200 100 200 100 200 100 110 110 200 100 200 With the arc-shaped protrusion and the arc-shaped slotin this embodiment, the first swing armis rotatably connected to the base, without disposing a complex sleeve structure. This simplifies a structure of connection between the first swing armand the base. In addition, in a process in which the first swing armrotates relative to the base, an angle of rotation of the first swing armrelative to the baseis reduced, and a part, extending out of the arc-shaped slot, of the arc-shaped protrusion decreases. In this case, a central angle corresponding to a portion, located within the arc-shaped slot, of the arc-shaped protrusion increases. This helps increase a mating area between the first swing armand the baseand improve stability of the first swing arm.

1 FIG. 8 FIG. 4 FIG. 700 700 220 100 700 100 700 220 100 700 100 700 100 220 110 100 700 110 110 700 700 110 In an optional embodiment, as shown inand, the hinge mechanism further includes a pressing cover. The pressing coveris disposed on a side that is of the first rotating connection portionand that faces away from the base, the pressing coveris connected to the base, and the pressing coverpresses the first rotating connection portionagainst the base. Optionally, the pressing coverand the basemay be fastened using threaded fasteners such as screws. Definitely, the pressing coverand the basemay alternatively be fastened by using other methods such as welding. Optionally, the first rotating connection portionis an arc-shaped protrusion, and an arc-shaped slotis provided in the base. As shown in, a surface that is of the pressing coverand that faces the arc-shaped protrusion is an arc surface, an outer surface of the arc-shaped protrusion is in contact with a slot wall surface of the arc-shaped slot, an inner surface of the arc-shaped slotis in contact with the arc surface of the pressing cover, and the pressing coverdoes not affect the relative sliding of the arc-shaped protrusion and the arc-shaped slot.

220 100 700 200 200 100 220 100 110 700 110 100 Pressing first rotating connection portionagainst the baseusing the pressing coverin this embodiment helps improve stability of the first swing armand avoid shaking of the first swing armrelative to the base. In addition, in the embodiment in which the first rotating connection portionis rotatably connected to the basevia the arc-shaped protrusion and the arc-shaped slot, the pressing covercan close a slot opening corresponding to the arc-shaped slot, avoiding breaks in the base. This helps improve rigidity performance and support performance of the hinge mechanism.

2 FIG. 800 800 100 800 300 800 200 800 100 800 200 300 200 300 In an optional embodiment, as shown in, the hinge mechanism further includes a support plate. The support plateis located on a side of the base, the support plateis connected to the frame connecting member, and the support plateis slidably connected to the first swing arm. Optionally, under the condition of the hinge mechanism being in the unfolded state, the support plateand the baseare on a same plane. The support platein this embodiment can shield the first swing armand the frame connecting member, avoiding direct exposure of the first swing armand the frame connecting member. This helps improve appearance performance of the hinge mechanism.

120 200 410 420 430 300 800 100 510 410 520 420 530 420 430 200 410 420 430 In an optional embodiment, a rotation shaft, a first swing arm, a second swing arm, a third swing arm, a fourth swing arm, a frame connecting member, and a support plateare disposed on each of two sides of the base. In addition, a first movable memberfits with the two second swing arms, a second movable memberfits with the two third swing arms, and a third movable memberfits with the two third swing armsand the two fourth swing arms. The first swing armis a virtual swing arm in the prior art, and the second swing arm, the third swing arm, and the fourth swing armare synchronous swing arms in the prior art.

15 FIG. 16 FIG. 910 920 910 920 910 920 200 300 100 910 920 300 100 200 Based on the hinge mechanism disclosed in this application, an embodiment of this application further provides an electronic device. As shown inand, the electronic device includes a first device body, a second device body, and the hinge mechanism in the above embodiments. The first device bodyis connected to the second device bodyvia the hinge mechanism. In the process in which the first device bodyand the second device bodyrotate relative to each other, the electronic device switches between an unfolded state and a folded state. Optionally, a first swing armand a frame connecting memberare disposed on each of two sides of the base, and the first device bodyand the second device bodyare connected to the frame connecting memberslocated on the two sides of the base, respectively. With this arrangement, the hinge mechanism of the electronic device can improve stability of the first swing arm. This helps improve folding reliability of the electronic device.

Embodiments of this application are described above with reference to the accompanying drawings, but this application is not limited to the specific embodiments described above. The specific embodiments described above are only illustrative but not restrictive. Many forms that persons of ordinary skill in the art can derive under the inspiration of this application without departing from the spirit of this application and the protection scope of the claims shall all fall within the protection scope of this application.